Not able to be intimate in relationship

[Lovelyivy]

I'm not able to post in "sex" forum so I'm trying here. I've always been extremely sexual person and enjoyed one night stands and casual sex or short relationships. I was really confident, loved to experiment...I was even going to bondage or bdsm events. I've been with my partner over a year and a half now and it's the longest I've been in relationship. I really struggle with being intimate - I turned in shy person I feel weird to experiment or initiate sex. I don't know what's wrong with me . I'm really attracted to my partner but for some reason I struggle with sex in relationship. Any advice or suggestion what the problem can be? Thank you everyone .

OP - I think a few things might be going on -
You didn’t mention (just said that you are attracted to him) - but I assume you may have developed feelings for him - so it all became more complex.
It’s easy to be confident and experiment if you don’t care about the other person, what he’d think of you, if he will still like you, etc.
Not the same if you actually care about the other person....

You also didn’t mention anything about your partner’s sexuality&history - and how that compares with yours.

If there is any mismatches there - that may make you more insecure....

But in some way - it doesn’t really matter what the root cause is.
What matters is that you and him talk - and be open about how you feel and what you want.